package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service

@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Transactional
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0)
        {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
dishFlavorMapper.insertBatch(flavors);
        }

    }
//分页查询
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
//批量删除
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        for (Long id : ids) {
          Dish dish=dishMapper.getbyId(id);
          if(dish.getStatus()== StatusConstant.ENABLE)
          {
              throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
          }
        }
        List<Long> setmealIds =setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0)
        {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//批量删除
//dishMapper.deleteByIds(ids);
//   dishFlavorMapper.deleteByDishIds(ids);
        for (Long id : ids) {
            dishMapper.deleteById(id);
            dishFlavorMapper.deletsByDishId(id);
        }

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getbyId(id);
      List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
DishVO dishVO=new DishVO();
BeanUtils.copyProperties(dish,dishVO);
dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.update(dish);
        dishFlavorMapper.deletsByDishId(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0)
        {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public List<Dish> list(Long categoryId) {
       Dish dish=Dish.builder()
               .categoryId(categoryId)
               .status(StatusConstant.ENABLE)
               .build();
        return dishMapper.list(dish);
    }
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    //update employee set status = ? where id = ?
    public void startOrStop(Integer status, Long id) {
        Dish dish = Dish.builder()
                .status(status)
                .id(id)
                .build();
        dishMapper.update(dish);
        //如果是停售操作，那么菜品所关联的套餐也不能售卖
        if(status == StatusConstant.DISABLE){
            ArrayList<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmealId from setmeal_dish where dish_id in (?,?,?)
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);

            if(setmealIds != null &&setmealIds.size()>0){
                for (Long setmealId :setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }


}
